Block Format Keyword Defines a part, which combines material and property information. Optionally, the interface gap can be specified.


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prop_ID mat_ID subset_ID Thick          


Field Contents SI Unit Example
part_ID Part identifier.

(Integer, maximum 10 digits)

part_title Part title.

(Character, maximum 100 characters)

unit_ID Optional unit identifier.

(Integer, maximum 10 digits)

prop_ID Property identifier of the elements in the part.


mat_ID Material identifier of the elements in the part mat_ID should be 0 for spring and rivet elements.


subset_ID (Optional) Subset identifier to which the part belongs If omitted, the part belongs to the global model subset.

Default = global model (Integer)

Thick (Optional) Virtual thickness for shells.

Define a thickness for shells, only used to calculate gap in interfaces. Only available for parts containing 3-node and 4-node shells.


[ m ]


  1. A part is a homogeneous element assembly. In one part, all elements are of the same type (shells, solids, beams, trusses, springs, rivet, and so on). The elements in a part refer to the same material number (mat_ID), and to the same property identifier (prop_ID).
  2. Several different parts may have the same material identifier. This is also true for property and subset identifier.
  3. The value of the virtual shell thickness defined on the Thick field supersedes the thickness defined in the shell property, if the value of the Thick field equals 0 in the /SHELL or /SH3N keyword.
  4. The virtual thickness for shells is used to compute the gap in interface types 7, 11, 18, 19, 20, 21, 24, and 25; and to compute dsearch in /INTER/TYPE2 in case of Ignore=2 or Ignore=3 and dsearch=0.
  5. For shell and thick shell composite parts with /PROP/TYPE10 (SH_COMP), /PROP/TYPE11 (SH_SANDW), /PROP/TYPE21 (TSH_ORTH) or /PROP/TYPE22 (TSH_COMP), materials are defined directly in the property card. The failure criteria defined within these materials (for example, LAW25) are accounted for. Material referred to in the /PART card is used only for calculation of time step and contact stiffness.